Allen Stream Crossing Project (Project) (Notification of Lake or Streambed Alteration, No. EPIMS-MEN-55822-R1C)

The Allen Stream Crossing Project involves a single-seasonal upgrade to an existing compacted soil stream crossing located in Mendocino County, California, within the Russian River watershed near Potter Valley. The work includes excavating fill material from the road and outfall area and installing a broad dip structure armored with angular rock—specifically, a 6-inch D50 surface layer and a 1.5-inch D50 angular base rock as detailed in design plans submitted on September 16, 2025. The crossing is restricted to seasonal use only and must remain inactive during any period of surface flow to prevent environmental disturbance. The project qualifies for a categorical exemption under California Code of Regulations Title 14, Section 15301, as it constitutes a minor alteration to an existing facility with no significant environmental impact. The project is administered by the California Department of Fish and Wildlife, Region 1 – Northern Region, with Penny Lancaster serving as the primary environmental scientist point of contact. No formal contract number, pricing data, or federal acquisition regulation clauses are present, indicating this is not a traditional procurement action but rather a regulatory notification and environmental exemption process under the state’s CEQA framework. There is no specified period of performance, payment terms, invoicing method, or contracting officer details, and no solicitation, offeror certifications, or socioeconomic requirements are documented. The permittee, Zachary Allen, is responsible for execution, and all work must conform to the submitted design plans and be verified on-site by CDFW. The location is identified by legal survey, parcel number, and USGS quadrangle, and all activities are subject to compliance with the established rock specifications and seasonal operational constraints.